Mitsos 312 build with Yamaha input trafo and yamaha opamp

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laddie.music

Well-known member
Joined
Nov 1, 2011
Messages
59
Hi there, i'm doing a 8 channel Mitsos 312 API build.

4 channels will be standard Gar 2520 / EA trannies,      the next 4 will be

Yamaha opamp  NE  80200  with Yamaha GA80980 (300ohms/2.7K ohms)

I'm just wondering if this Changes any values on the BOM, or do I just keep the same caps / resistors for both types.

thanks heaps in advance
 
It should mostly be the same, I am not too familiar with the PM2000 and how yamaha used these parts specifically, and a quicksearch yielded no schematic here. (foudn a few posts from people that have the schemo, and a dead link).

read this thread, it will probably answer everything:
http://www.groupdiy.com/index.php?topic=15010.0

Check for zobel values for the input trafo (R10 and CZ)
Check feedback R and C. (R17 and CF)

I also think they ran at +/-24V, not sure about this though.  And I don't know how they'll handle a DI input direct to the opamp, so don't forget those diodes near the input socket holes.  The rest should be pretty much the same I think, but feel free to ask questions in the main thread:

http://www.groupdiy.com/index.php?topic=41339.0

good luck!
 
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